[Dbix-class] many to many set_$rel return value

[Richard Jolly]

Hi,

I need to do  what set_$rel accomplishes on a many to many relationship.
But I have the additional requirement that I need to know if any items
have changed. 

One implementation is something like this:

sub set_version_types {
    my ($self, at types) = @_;

   # or could use Set::* modules
    my $existing = join '-', sort map { $_->public_id }
$self->version_types;
    my $new      = join '-', sort map { $_->public_id } @types;

    return 0 if $existing eq $new;

    $self->next::method(@types);

    return 1;

}

But I'd like this on generically - eg on all many to many rels. I could
subclass Relationship::ManytoMany, but it's one big method in there.

So my questions are: how best to do this generically, and is a solution
to this useful for DBIC in general?

Thanks,

Richard J.


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